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Finding the Fourth Proportional to 77,325.50, 115,988.25 and 18,957.50

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Solution

The fourth proportional to 77,325.50, 115,988.25 and 18,957.50 is: 28,436.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,325.50 : 115,988.25 = 18,957.50 : x
  2. Step 2: Convert to fraction form
    77,325.50/115,988.25 = 18,957.50/x
  3. Step 3: Cross multiply
    77,325.50x = 115,988.25 × 18,957.50
  4. Step 4: Simplify right side
    77,325.50x = 2,198,847,249.38
  5. Step 5: Solve for x
    x = 2,198,847,249.38/77,325.50
  6. Step 6: Final answer
    x = 28,436.25

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.